1.显示/隐藏
|
1
2
3
4
5
6
7
8
9
10
|
//hide() Object.prototype.hide = function(){ this.style.display="none"; return this; } //show() Object.prototype.show = function(){ this.style.display="block"; return this; } |
return this的好处在于链式调用。
2.滑动 省略speed和callback的传入，因为要加一串判断和处理回调，代码量大
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
//slideDown() Object.prototype.slideDown = function(){ this.style.display = 'block'; if(this.clientHeight<this.scrollHeight){ this.style.height=10+this.clientHeight+"px"; var _this = this; setTimeout(function(){_this.slideDown()},10) }else{ this.style.height=this.scrollHeight+"px"; } } //slideUp() Object.prototype.slideUp = function(){ if(this.clientHeight>0){ this.style.height=this.clientHeight-10+"px"; var _this = this; setTimeout(function(){_this.slideUp()},10) }else{ this.style.height=0; this.style.display = 'none'; } } |
3.捕获/设置
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
//attr() Object.prototype.attr = function(){ if(arguments.length==1){ return eval("this."+arguments[0]); }else if(arguments.length==2){ eval("this."+arguments[0]+"="+arguments[1]); return this; } } //val() Object.prototype.val = function(){ if(arguments.length==0){ return this.value; }else if(arguments.length==1){ this.value = arguments[0]; return this; } } //html() Object.prototype.html = function(){ if(arguments.length==0){ return this.innerHTML; }else if(arguments.length==1){ this.innerHTML = arguments[0]; return this; } } //text()需要在html()结果基础上排除标签，会很长，省略 |
4.CSS方法
|
1
2
3
4
5
6
7
8
9
|
//css() Object.prototype.css = function(){ if(arguments.length==1){ return eval("this.style."+arguments[0]); }else if(arguments.length==2){ eval("this.style."+arguments[0]+"='"+arguments[1]+"'"); return this; } } |
5.添加元素
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
//append() Object.prototype.append = function(newElem){ this.innerHTML += newElem; return this; } //prepend() Object.prototype.prepend = function(newElem){ this.innerHTML = arguments[0] + this.innerHTML; return this; } //after() Object.prototype.after = function(newElem){ this.outerHTML += arguments[0]; return this; } //before() Object.prototype.before = function(newElem){ this.outerHTML = arguments[0] + this.outerHTML; return this; } |
6.删除/替换元素
|
1
2
3
4
5
6
7
8
9
10
11
|
//empty() Object.prototype.empty = function(){ this.innerHTML = ""; return this; } //replaceWith() Object.prototype.replaceWith = function(newElem){ this.outerHTML = arguments[0]; return this; } //remove() js自带，省略。 |
7.设置css类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
//hasClass() Object.prototype.hasClass = function(cName){ return !!this.className.match( new RegExp( "(\s|^)" + cName + "(\s|$)") ); } //addClass() Object.prototype.addClass = function(cName){ if( !this.hasClass( cName ) ){ this.className += " " + cName; } return this; } //removeClass() Object.prototype.removeClass = function(cName){ if( this.hasClass( cName ) ){ this.className = this.className.replace( new RegExp( "(\s|^)" + cName + "(\s|$)" )," " ); } return this; } |
上面的设置CSS类也可以利用html5新API classList及contains实现 但不兼容IE8以下及部分火狐浏览器
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
Object.prototype.hasClass = function(cName){ return this.classList.contains(cName) } Object.prototype.addClass = function(cName){ if( !this.hasClass( cName ) ){ this.classList.add(cName); } return this; } Object.prototype.removeClass = function(cName){ if( this.hasClass( cName ) ){ this.classList.remove(cName); } return this; } |
9.选择器
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
//id或class选择器$("elem") function $(strExpr){ var idExpr = /^(?:s*(<[wW]+>)[^>]*|#([w-]*))$/; var classExpr = /^(?:s*(<[wW]+>)[^>]*|.([w-]*))$/; if(idExpr.test(strExpr)){ var idMatch = idExpr.exec(strExpr); return document.getElementById(idMatch[2]); }else if(classExpr.test(strExpr)){ var classMatch = classExpr.exec(strExpr); var allElement = document.getElementsByTagName("*"); var ClassMatch = []; for(var i=0,l=allElement.length; i<l; i++){ if(allElement[i].className.match( new RegExp( "(\s|^)" + classMatch[2] + "(\s|$)") )){ ClassMatch.push(allElement[i]); } } return ClassMatch; } } |
需要强调的是，选择器返回的结果或结果集包含的是htmlDOM，并非jquery的对象。大多数人都知道，document.getElementById("id")等价于jquery$("#id")[0]，另外上面class选择器选择的结果如需使用，需要利用forEach遍历：
|
1
2
3
|
$(".cls").forEach(function(e){ e.css("background","#f6f6f6") }) |
10.遍历 siblings()和children()获取的结果也需要结合forEach使用
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
//siblings() Object.prototype.siblings = function(){ var chid=this.parentNode.children; var eleMatch = []; for(var i=0,l=chid.length;i<l;i++){ if(chid[i]!=this){ eleMatch.push(chid[i]); } } return eleMatch; } //children() 原生js已含有该方法，故命名为userChildren。 Object.prototype.userChildren = function(){ var chid=this.childNodes; var eleMatch = []; for(var i=0,l=chid.length;i<l;i++){ eleMatch.push(chid[i]); } return eleMatch; } //parent() Object.prototype.parent = function(){ return this.parentNode; } //next() Object.prototype.next = function(){ return this.nextElementSibling; } //prev() Object.prototype.prev = function(){ return this.previousElementSibling; } |